氮、钾营养对香蕉生长的影响

Effects of nitrogen and potassium combinations on the growth of banana

研究了氮、钾不同供应水平对香蕉产量、品质、贮藏性和抗冻能力的影响。结果表明,以适量配施氮钾肥的N_2PK_2处理香蕉果实农艺性状最佳,品质最优,产量最高,较不施肥处理增产16.1%;且果实贮藏性好,吸芽受冻死亡率最低。在广州市番禺区香蕉产区,获得第一年蕉45 t/hm^2左右的高产,需要施N 667～709、P_2O_5 200～213、K_2O 748～851 kg/hm^2;保持氮钾肥施用比例N:K_2O为1:1.12～1.20为宜。

Potassium and nitrogen are the two mostly needed nutrients by banana. A field experiment was conducted to investigate the effects of nitrogen and potassium doses on the growth, yield, and quality of banana, storability of banana fruit, and resistance to cold weather of daughter plant. The results showed that N2PK2 treatment increased the fruit yield by 16.1%, as compared to the no fertilizer amended treatment. The N2PK2 treatment produced banana fruit with better storability and lower daughter plant mortality caused by freeze stricken. To obtain the high yield of 45 t banana per hectare in Panyu Guangzhou, N 667-709 kg/ha, P2O5 200-213 kg/ha and K2O 748-851 kg/ha is recommended with the N： K2O ratio being 1：1. 12-1.20.